An Integrated Magnetic Spectrometer for Multiplexed Biosensing

📋 论文概要

该论文提出了一种集成磁谱仪，用于多路复用生物传感，解决了传统荧光检测成本高、需要光学元件的问题，提供了基于磁标记的低成本、高灵敏度检测方案。

💡 主要创新点

• 提出了一种无需外部磁铁的集成磁谱仪，采用频率偏移检测机制实现高灵敏度生物分子检测。
• 实现了多路复用生物传感能力，能够在同一芯片上同时检测多种生物标志物。

🏷 关键词

📄 原文摘要

There is high demand for at-home and point-of-care medical diagnostic tools as a step toward fast, low-cost, personal medicine. Integrated biosensors based on magnetic labeling schemes offer higher sensitivity and lower cost due to the elimination of the optics and have emerged as a viable alternative to assays that use fluorescence for biomolecular detection. For instance, the frequency-shift sensor of [1] demonstrates a high-sensitivity example of a cost-effective magnetic particle biosensor in CMOS with no need for external magnets. Despite their cost and sensitivity advantages, magnetic biosensors reported so far suffer from a lack of multi-probe diagnostics similar to fluorescent-based approaches that use multiple colors for simultaneous single-site multiple target differentiation. This is primarily because current approaches measure changes in the magnetic susceptibility, χ, either at low frequencies [2,3] or at a fixed RF frequency

👥 作者与机构

Constantine Sideris, Ali Hajimiri

California Institute of Technology, Pasadena, CA